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 Mar28 awarded Autobiographer Aug24 awarded Popular Question Jul4 accepted Completing the squares for matrices Jul4 accepted What is the smallest number which begins with 7 and if you bring the 7 to the least significant position it becomes a third of the original number? Jul2 awarded Curious Dec5 asked What is the smallest number which begins with 7 and if you bring the 7 to the least significant position it becomes a third of the original number? Dec9 comment How to go from Fermat’s little theorem to Euler’s theorem thought Ivory’s demonstration? yes you're right i'm starting to get the picture Dec9 comment How to go from Fermat’s little theorem to Euler’s theorem thought Ivory’s demonstration? not modulo m but modulo totient of m Dec9 asked How to go from Fermat’s little theorem to Euler’s theorem thought Ivory’s demonstration? Dec1 accepted How to prove that if $a\equiv b \pmod{2n}$ then $a^2\equiv b^2 \pmod{2^2n}$ Dec1 comment How to prove that if $a\equiv b \pmod{2n}$ then $a^2\equiv b^2 \pmod{2^2n}$ It works anyway! Thanks! Dec1 comment How to prove that if $a\equiv b \pmod{2n}$ then $a^2\equiv b^2 \pmod{2^2n}$ Thanks but I’m not sure about the binomial theorem. Is that right? I think it misses a $b^{k-i}$ in the sum. Dec1 asked How to prove that if $a\equiv b \pmod{2n}$ then $a^2\equiv b^2 \pmod{2^2n}$ Jul20 awarded Student Jun21 awarded Scholar Jun21 accepted Completion of the squares (actually of the quadratic forms) Jun20 comment Completion of the squares (actually of the quadratic forms) Various: System Identification (Stoica), Estimation with application to tracking and navigation (Li, Bar-Shalon)... Jun20 asked Completion of the squares (actually of the quadratic forms) Jun12 awarded Supporter Jun12 revised Completing the squares for matrices deleted 13 characters in body